BIBIilOGRAPHY OP PAL^^i^OZOIC CRTTSTACEA ' 121 



WALCO TT (Charles D.) — Continu ed 



Merostomata: Sidneyia inrxpedans \\'alc. 



Habelia n. gen., //. oplaia ii. sp. I'^meialdella ii. gen., ¥.. hrocki n. sp., £. micruru 

 n. sp. Molaria n. gen., .17. sp\n'i\era n. sp. 



Family undetermined. Nathorstia n. gen., A'. Iransilcnts n. sp. 



The specific name transitans to this species vs'as given on account of its suggesting a 

 transition between Merostone-like form, such as Molaria spinifera and tlie triiobites. 



Class Crustacea: Order Anostraca — Caiman Opahinidae, new family. Opabinia 

 n. gen., (). regaiis n. sp., (). media n. sp. Lrani lioilici n. gen., /,. superlala n. pp. 

 Yohoia n. gen., Y. tenuis n. sp., Y. plena n. sji. Bideiitia n. gen., B. Jifficilis ii. sp. 



Order Notostraca — Caiman Naraoidae n. fam. Naraoia n. gen., .\'. compacta n. sp. 

 Burgessidae new fam. Burgessia n. gen., Ii. hella n. sp. 



Cienus Anomalocaris Whiteaves, .1. i^ii^antea n. sp. 



Waptidae: Waptia n. gen., IV. fieldensi.f n. sp. 



Hurdia n. gen. //. -victoria n. sp., //. trianj^ulata n. sp. 



Tuzoia n. gen., T. retifera n. sp. 



Odaraia n. gen., (). alata n. sp. Fieldia n. gen., /■'. lanreolata n. sp. 



Carnarvonia n. gen., C. venosa n. sp. 



Mollisonia n. gen., M. symmetrica u. sp., .1/. i^racilis n. sp., M. rara n. sp. 



Tontoia n. gen., T. kii-a^untensis n. sp. 



('aiuhrian Gt^oloy-v and Palu'ontolouA' — 2, No. 8. The Sardinian 



Cam))rian genus Olenopsis in America. 



Smithsonian Misc. Coll., vol. 57, No. 8, 1912, with plate 36. 



The author describes and figures Olenopsis zoppii Meneghini, (). agnesensis n. sp., 

 O. americanits n. sp., O. roddyi n. sp. 



Dr. Bornemann distinguishes Olenopsis from Olenus, on account of its having a 

 small, rounded tail shield, with unsegmented axis; by the particularly semicircular 

 outline of the cephalon ; the conic, nearly smooth, glabella, and 14 or 15 body segments. 



Cambrian Geology and I'ala'ontology — 2, No. !). New York 



Pot.sdam, Iloyt Fauna, Avitli plates 'MA\). 



Smithsonian Misc. Collection, vol. 57, No. 9, 1912. 



Crustacea : 



Ptyelioparia miniita Bradley, 1'. mallieri n. sp. C.onocephalina vjliiteliallensis n. sp. 

 Pui^odia seelyi n. sp. Agraulos saratoge/isis Wale. 'I'his species was described as 

 Bat/iyurus armaius Billings (Walcott, 32 Ann. Rep. N. V. State Mus., p. 131) and as 

 Ptyelioparia (A.) saratogensis Walcott (Bull. No. 30, U. S. Geol. Sur., p. 21). Loncli- 

 ocephalus ealeiferniis ^^'alcott, previously described under the genus Conocephalites 

 antl Ptychoparia. 



The species is closels' related to Loncliocephalus ^visansensis Owen. It differs in 

 having a relatively shorter frontal litnb and longer jialpebral lobes. 



Ptyehaspis speeiosus Walcott. 



Dicelloeeplialus Ilartti Walcott. This was the C.onoceplialites liartti Wale. (32 Ann. 

 Rep. N. Y. State Mus., p. 130). 



The species differs from Dieelloeeplinliis minnesotensis in details, but ii ajipears to 

 come within the limits of the genus. 



Dieelloeephalus tribulis n. sp. allied to D. misa Hall. 



I'he author also describes and illustrates sc\eral tracks of crustaceans under Owen's 

 gen. Frotichnites. The author remarks that the particular irilobile thai left tracks on 

 the beaches of Potsdam sandstone time were inuloubtcdK- species of the genus Dieello- 

 eephalus. 



